baber/WOPTO huggingface dataset:
Patent GB-525056-A (GB)
Title: Improvements in and relating to electric motor control systems
IPC: H02J3/42
Filed: 1939-02-13
Abstract: 525,056. Synchronizing. BRITISH THOMSONHOUSTON CO., Ltd. Feb. 13, 1939, No. 4688. Convention date, Feb. 12, 1938. [Class 38 (iii)] Relates to means for controlling the application of excitation to a synchronous machine so as to pull it into synchronism and for controlling the withdrawal of excitation on loss of synchronism. In the Figure a synchronous motor 1 is started by closing a manually controlled switch 4 to connect armature winding 2 directly across a polyphase supply 5, field winding 3 being shunted by a discharge resistance 6. The machine, which also possesses a squirrel-cage winding (not shown), then starts as an induction motor and accelerates to approximately synchronous speed. A relay 20, which is energized from a source of direct current through auxiliary contacts 21 which are closed when switch 4 is closed, has a time-delay sufficient to cover this running-up period and operates when the motor is running at approximately synchronous speed to close contacts 24 so that a quick-acting relay 10, in series with a half-wave copper oxide rectifier 11 and a rotary make and break element 14, is supplied from a single-phase potential transformer 12 connected across a pair of the motor terminals. The rotary make and break 14 is driven by the motor and, with the two-pole arrangement shown, a conducting strip 15 is rotated past brushes 16 and 17 so as to connect them once during every revolution of the rotor for a period of approximately one half-cycle of the supply voltage. Only if this conductive period coincides with a predetermined half-cycle of the supply is relay 10 energized sufficiently to operate. When relay 10 does operate coil 8 is energized, through closed contacts 27 and 23, from transformer 12 to close field switch 7 which disconnects the motor field from resistance 6 and connects it to a source of direct current to pull the motor into synchronism. Auxiliary contacts 32 on the field switch ensure that it remains closed after relay 10 opens, while auxiliary contacts 25 de-energize relay 20 which, however, does not open until after relay 10 so that the energization of coil 8 is not interrupted. With the motor running synchronously, contacts 33 on the closed field switch complete a circuit across transformer 12 which includes closed contacts 22, a second pair of brushes 17<1> and 18 on make and break 14, rectifier 11 and relay 10. Should the motor fall out of step the curren't in this circuit is sufficient to operate relay 10 to de-energize coil 8 and open the field switch to restore the conditions at starting. The motor may have more than two poles and any known method of starting to bring the motor up to nearly synchronous speed may be employed.
Patent GB-939944-A (GB)
Title: Improvements in or relating to magnetic memory elements
IPC: G11C11/12
Filed: 1960-01-13
Abstract: 939,944. Magnetic storage devices. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 10, 1960 [Feb. 13, 1959], No. 4688/60. Class 40 (9). [Also in Group XXXV] A magnetic memory element comprises a helical wire of material having a rectangular hysterisis loop. Such an element serves as a "twistor." The helix is first wound on a mandrel. After annealing, it is removed and stretched to about twice its length. A suitable material is an alloy of 79% Ni, 4% Mo, 0.5% Mn, 16.5% Fe. A two or three dimensional storage matrix may be built up of such elements. A number of " twisters " may themselves form part of a control conductor.
Patent GB-608111-A (GB)
Title: Improvements in or relating to the production of organic fluorine compounds
IPC: C07C17/20
Filed: 1946-02-15
Abstract: Monofluoro derivatives of saturated halohydrocarbons are prepared by reacting a saturated aliphatic halogenated hydrocarbon not containing fluorine but having at least two halogen atoms other than fluorine attached to the same terminal carbon atom, at a temperature of at least 30 DEG  C. and at elevated pressure, with at least the stoichiometric equivalent of anhydrous hydrogen fluoride in the presence of at least 2.5 per cent by weight of stannic chloride, based on the halo-hydrocarbon starting material, as catalyst. Temperatures of 50 DEG  to 150 DEG  C. and pressures of 100 to 200 lbs. per sq. in. are preferred.  To minimise formation of difluoro compounds, the monofluoro compound should be removed as formed; thus, in a continuous process, the p  hydrogen fluoride is fed into a reaction vessel whilst the monofluoro compound is continuously removed.  Examples describe the interaction of hydrogen fluoride with (1) ethylidene dichloride, both batchwise and continuous, yielding 1-fluoro-1-chloro-ethane and 1 : 1-difluoroethane; (2) asym.-tetrachlorethane yielding 1-fluoro-1 : 1 : 2-trichlorethane and some 1 : 1-difluoro-1 : 2-dichloroethane; (3) 1 : 1 : 2- trichlorethane yielding 1-fluoro-1 : 2-dichlorethane. Reference is made to Specifications 391,168 and 428,361 and U.S.A. Specification 2,005,711.  The Provisional Specification is not limited to the use of the above amounts of hydrogen fluoride and stannic chloride.
Patent GB-336534-A (GB)
Title: Improvements in automatic shaft couplings
IPC: F16D43/22
Filed: 1930-02-14
Abstract: 336,534. Thomas, P. J. Feb. 15, 1929, [Convention date]. Variable-speed epicyclic gearing. - An automatic shaft coupling comprises an epicyclic gear wherein radial spindles rotatable with the planets are movable radially under centrifugal force to cause a gradual braking effect on the planets. finally yielding a solid drive. A driving shaft 1 carries a bevel wheel 6 gearing, through the intermediary of four planet wheels 8<1>, 8<2>, &c., with a bevel wheel 7 carried by a driven shaft 2. Mounted on ball bearings on the bosses of wheels 6, 7 are box-shaped members 4<1>, 4<2> united by cross-bolts, as shown, and forming a. support for cylinders 12<1>, 12<3>, &c. The planets are supported in ball bearings and are freely mounted on a rotatable cross-member 41<1>. They are each formed on their outer part 20 with an axial groove engaged by the rectangular part of a spindle 22 which is rotatable with but radially movable relative to the planets and housing. Each spindle 22 has a conical surface adapted to wedge under centrifugal force against conical caged rollers 24, thereby braking the planets. The outer part of the spindle runs in ball bearings in a cup member 29 displaceable with the spindle. The cylinder is closed by a screw-plug 36 and the spindle 22 is biassed inwardly by a spring 37, which as the speed of the driver reduces pushes the spindle and gradually frees the planets. Each cylinder is provided with cooling ribs and in the form shown four planets are provided, four equally spaced cylinders being journaled about the shafts.
Patent GB-1440261-A (GB)
Title: Lubricant compositions
IPC: C10M163/00
Filed: 1973-02-01
Abstract: 1440261 Lubricants EXXON RESEARCH & ENG CO 1 Feb 1974 [1 Feb 1973] 5086/73 Heading C5F A composition comprises a lubricating oil, a detergent or dispersant additive and a mixture of at least two carboxylic acids of which one has a melting point of at least 20‹ C. and not more than 30 carbon atoms per molecule and the other melts below 20‹ C., the weight ratio of low-melting to high-melting acid being between 1À5 and 8. The base oil may be animal, vegetable, mineral, oxidized mineral oil or synthetic; examples of each are listed, as also are examples of detergent additives and carboxylic acids. The compositions are suitable for use as lubricants in wet braking systems, and may also contain other additives, some of which are listed.
Patent GB-398100-A (GB)
Title: Means for the division of a beam of light into two equal and parallel components
IPC: G02B27/14
Filed: 1933-02-20
Abstract: 398,100. Optical systems. BELLING- HAM, L. and STANLEY, F., 71, Hornsey Rise, London. Feb. 20, 1933, No. 5121. [Class 97 (i).] A system for dividing an incident beam of light into two parallel beams of equal intensity comprises a prism of the Nicol type combined with means whereby the reflected beam is again reflected at a surface parallel with the reflecting surface of the prism so as to emerge parallel to, but spaced from, the incident beam and the component transmitted by the prism. In the form shown, the equivalent of a Nicol prism is formed by two glass prisms a, b separated by a layer c of doubly-refracting material. The light reflected by the layer c enters a prism d having a reflecting surface e parallel to the layer c, so that it emerges from the prism d in a direction parallel to that of the beam transmitted by the layer c and prism b. A rhomb g having two parallel reflecting surfaces may be placed against the exit surface of the prism b so as to alter the displacement between the two emergent beams without affecting their parallelism. The optical lengths of the two paths may be equalized by extending the appropriate exit member. When used for colour photography, either a double lens system l in rear of the dividing system, or a single lens l<1 >in front of the system, may be employed in conjunction with colour screens s<1>, s<2>.
Patent GB-678028-A (GB)
Title: Improvements in or relating to formers for bending machines for tubes, rods and the like
IPC: B21D7/06
Filed: 1950-03-01
Abstract: 678,028. Bending - formers. TUBELA ENGINEERING CO., Ltd., AHLIN, F., and. RIDEALGH, H. Feb. 21, 1951 [March 1, 1950], No. 5148/50. Class 83 (iv). A former for a reciprocating bender comprises a curved split member C, C<SP>1</SP> with straight sides C2 inclined at an angle of 25- 40 degrees co-operating with inclines on a member A pressed by a ram B. After bending the tube is ejected from the former by inserting a tool through slots in the member A to lift the split member C, C<SP>1</SP> from the member A. A former of similar construction may be used as a straight sided shoe for insertion between a roller pressure member on a hinged arm and a grooved former of a pivoted bender.
Patent GB-1364754-A (GB)
Title: Mine explosion suppression method and apparatus
IPC: A62C3/02
Filed: 1972-02-03
Abstract: 1364754 Mining machines WALTER KIDDE & CO Inc 3 Feb 1972 [11 Feb 1971] 5160/72 Heading E1F [Also in Division A5] Explosions in mine tunnels are suppressed by locating radiation sensor means to receive radiation from a detection zone but shielding said means from radiation from another zone nearer the tunnel face, and releasing explosion suppressant from a sealed container in response to detection of radiation by the sensor. Preferably the sensor and the suppressant container are mounted on a mobile "continuous miner" as shown in Fig. 1, in which machine 11 has cutter head assembly 13 that excavates coal from face 14 of tunnel 12. Detection units 15 with UV-responsive sensor heads 16 are mounted on the front of 11, each head having shielding masks 34, 25 (Fig. 2) to limit the radiation received to that within annular fan-shaped volume indicated by dashed lines 17, forming detection zone A comprising a lateral section of tunnel 12. Mounted on the rear of 11 are suppression units 21 operatively connected to detectors 15 and arranged to discharge suppressant in a further fan-shaped space indicated by dashed lines 22 and forming discharge zone B. Thus two obscured zones are provided, zone C ahead of 11 extending from the front surface of zone A to mine face 14, and zone D extending rearwardly of zone A, and these zones enable short duration emissions of radiation from face 14 to be ignored and flame fronts propagating down tunnel 12 detected. Fig. 3 shows suppressor unit 21 comprising cylinder 41 containing suppressant 42, e.g. CH 3 Br, and discharge tube 43 closed by frangible diaphragm 44. Cylindrical screen 45 and deflector plate 46 are mounted on the closed end of 43, and detonator assembly 47 projects into 43 adjacent diaphragm 44. 47 explodes in response to a signal on line 48, rupturing diaphragm 44 and releasing suppressant in a discharge pattern indicated by dashed lines 22.
Patent GB-265394-A (GB)
Title: An adjustable frame for maintaining the shape of mens soft hats
IPC: A42B1/00
Filed: 1926-02-23
Abstract: 265,394. Oliver, A. A. Feb. 23, 1926. Stiffeners.-A frame for maintaining the shape of a man's soft hat comprises substantially Y- shaped front and rear corner members of which the upper V portion is inclined with respect to the stem portion 2, and all three limbs are tubular. Cane, metal, or other pliable rods 5 are longitudinally adjustable within the tubes and support the raised portions of the crown on either side of the usual dent. The front and rear supports may comprise spatula-like members 4 fitting behind the sweat band, or curved bands in a similar position and provided with sockets into which canes or the like similar to the rods 5 are fitted.
Patent GB-781322-A (GB)
Title: Improvements relating to demountable siphon heads
IPC: B67D1/04
Filed: 1955-02-21
Abstract: 781,322. Siphon heads. AICART, E. B. Feb. 21, 1955 [Oct. 12, 1954], No. 5178/55. Class 14 (1). A siphon head comprises a spring-loaded valve 23 and a seating member 12 secured by its screw-threaded skirt 14 and a fixing nut 15 to the neck of the siphon body, the seating member 12 having an inner screw-threaded projection 17 on or in which is threaded a valve casing 19 permitting regulation of the loading of the valve spring 25 and the seating member 12 having also an external projection 26 engaging in a recess 30 of a detachable nozzle portion 28 either by means of screw threads as shown, or by a bayonet-joint. The nozzle portion carries a spring-loaded rod 34 and lever 36 for operating the valve. An aperture 21 is formed in the seating member and terminates in the valve seat proper 22, the disc valve 23 having an upper stem extending in the aperture 21 and a lower stem guiding the spring 25. Adjustment of the loading of the spring 25 is effected by adjustment of the screw-thread connection of the parts 17, 19.
Patent GB-990184-A (GB)
Title: Improvements in and relating to electric motors
IPC: H02K5/128
Filed: 1962-02-09
Abstract: 990,184. Electric motors. G. BAUKNECHT G.m.b.H. ELEKTROTECHNISCHE FABRIKEN. Feb. 9, 1962 [Feb. 21, 1961], No. 5180/62. Heading H2A. In a gap-tube electric motor, liquid-tight seals are eliminated by making the gap tube 4 integrally with a cover 5, which closes the front end of the stator chamber in a pot-shaped motor casing 1, by drawing, pressing &c. plastic deformation of the cover material. Thermal expansion of the tube is permitted by supporting its integral end closure wall 4<SP>1</SP> on an annular flange 4<SP>11</SP> which is axially slidable on an annular shoulder 6 on the casing base wall 1<SP>1</SP>. Transparent windows may be inserted in the walls 1<SP>1</SP>, 4<SP>1</SP> opposite the shaft end.
Patent GB-596442-A (GB)
Title: Improvement in antenna systems
IPC: G01S1/02
Filed: 1945-03-01
Abstract: 596,442. Directive radio systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 1, 1945, No. 5186. Convention date, Sept. 30, 1941. [Class 40 (v)] An antenna system for establishing overlapping field patterns consists of an inner pair of antennµ, half a wavelength apart, and an outer pair a wavelength apart, arranged symmetrically and substantially linearly with respect to the inner pair. The inner pair of antennµ are fed in phase, and the outer pair in phase opposition and in phase quadrature with the inner pair ; overlapping patterns are created by alternately reversing the phase of the currents supplied to one of the pairs. Dipoles 1 and 3, half a wavelength apart are connected by a sub-feeder 29 an even number of half wavelengths long to minimize mutual coupling, which is centrally connected through a feeder 31 with a radio device 33. The two outside dipoles 5 and 7 are connected by a second sub-feeder 35 also an even number of half wavelengths long and having a transposition in one half; the mid-point of this sub-feeder is connected to radio device 33 by a second feeder 37 whose length is such that the difference in length from device 33 to either antennµ of the respective pairs is an odd number of quarter wavelengths. A full wavelength of line 39 is connected across a half wavelength of feeder 37 and switches 45 and 47 are connected across the lines 37 and 39 respectively at points a quarter wavelength from either of their junctions. These switches are arranged to close alternately and may be operated by a motor 49, so varying the length of the low impedance path between antennµ 5 and 7 and device 33 by a half wavelength and reversing the phase of applied signals. In an embodiment, Fig. 5 (not shown), having improved vertical directivity the antennµ are parallel horizontal dipoles and in addition to the pairs 1, 3; 5, 7, a second row 1<1>, 3<1>; 5<1>, 7<1> is introduced, spaced half a wavelength above, with corresponding members of the two rows connected by transposed half wavelength lines. In a further embodiment, schematically shown in Fig. 6, four differently directed beams, left, right and up or down, with a mutually overlapping portion, may be radiated. Four inner antennµ at the corners of a half wavelengthsided square are connected in phase to device 33 and four outer antennµ at the corners of a full wavelength square are connected in pairs diagonally as shown. Main feeders 37<1> and 37<11> provided with similar switching correspond to feeder 37 of Fig. 4 and the switching sequence is arranged to direct the beam in the four directions cyclically. Other types of antennµ may be used and for turnstile antennµ mutual coupling will be neutralized by sub-feeders an odd instead of an even number of half wavelengths long. A grounded screen may be used for suppressing radiation to the rear of the system.
Patent GB-764061-A (GB)
Title: A new or improved means for mounting tools
IPC: B25H3/02
Filed: 1953-02-25
Abstract: 764,061. Boxes; packaging. HOLMES, W. J. Feb. 25, 1954 [Feb. 25, 1953], No. 5225/53. Classes 18 and 94(1). [Also in Groups XIV and XXV] A tool box has means for mounting the contents consisting of perforated plates 15, 133 to which are secured brackets &c. 16 by screws engaging the perforations, in any selected position. In alternative embodiments to that shown, a box may have one hinged portion on a box such as 10, the box having a further tool supporting part extending above it and secured to it, in lieu of a second hinged part such as 131. A box may have sliding drawers or frames carrying perforated sheets to which are secured the mounting means. Specification 764,062 [Group XXV] is referred to.
Patent GB-249653-A (GB)
Title: Apparatus for measuring the depth or density of water
IPC: G01C13/00
Filed: 1925-02-26
Abstract: 249,653. Wollaston, H. J. Buchanan- Feb. 26, 1925. Indicators actuated by pressure of head of liquid.- Apparatus for measuring the depth or the density of water comprises a flexible or partly flexible, but not necessarily elastic, bag or container connected to a flexible or rigid tube which at its open upper end is under atmospheric pressure, the bag and the tube being filled with a liquid of known density which is different from that of the surrounding water. The difference between the height of the liquid in the tube .and the level of the surrounding water (e.g. sea level) is a measure of the depth to which the bag is submerged if the density of the surrounding water is known, or of the density of the water if the bag is submerged to a known depth. By duplicating the apparatus and using different liquids in the two bags which are submerged to the same depth, both this depth and the density of the surrounding water can be found. The figs. show such a duplicate arranement comprising bags or containers J, K carried by a support I and connected by tubes E, G to open-ended tubes A, C, supported on a fixed or floating body at the surface. The tubes A, C have constrictions D to damp oscillations of the liquid within them. The support for these tubes carries a third tube B, open at its upper end and having a small orifice F below the water line; this tube indicates the water level. The weights of the tubes E, G are supported by a chain H which at its lower end carries a cradle M to which the support I is attached. The bags are weighted with shot L to ensure that they will sink to the required depth. The form of support I shown is adapted to rest on the substratum, or the apparatus may be attached to a fishing net &c. to indicate its depth below the surface.
Patent GB-463508-A (GB)
Title: An improvement in braces
IPC: A41F3/00
Filed: 1936-02-21
Abstract: 463,508. Braces; belts. PARIS, B. Feb. 21, 1936, Nos. 5317 and 5318. Convention dates, Feb. 28, 1935 and June 11, 1935. [Class 141] Braces of the kind which can be converted into belts comprise two separable straps 1, 2 to one end of each of which is permanently attached a brace tab 8 having a fastener, preferably of the dome type 9, 9a, so that it can be folded over to form a loop to receive a double button tab 10, and to the other ends of which are attached loops 4 to which button tabs are detachably connected. Buckles 3 are provided whereby the length of the straps 1, 2 can be adjusted. In one form of the invention, a strip of material is stitched to the strap 2 to form an eye 12 through which the strap 1 is inserted. Separate button tabs 6 are secured by dome fasteners 7 to the metal loops 4. In another form, button tabs 20 are permanently secured to a separate fork piece 17 which is also provided with tongues 15 which engage the loops 4. To form a belt, the fasteners 7 in the first form, or 15 in the second form, are undone, the straps separated and the double brace tabs 10 removed. Either strap can then be used as a belt, the brace tab 8 engaging the loop 4 to form a fastening.
Patent GB-545952-A (GB)
Title: A new or improved chuck
IPC: B23B31/163
Filed: 1941-04-28
Abstract: 545,952. Chucks. MILLER CHUCK CO., Ltd., and MILLER, J. April 28, 1941, No. 5456. [Class 83 (iii)] A cam-closed chuck has the cam plate a formed with a recess fitted with a hardened bush c having a groove d engaged by a projection e on a nut f which is moved along a groove in the back plate l by an operating screw g to open and close the chuck.
Patent GB-496354-A (GB)
Title: A process for the preparation of size solutions and size compositions containing salts of cellulose ether carboxylic acids as their essential constituent
IPC: C08B11/12
Filed: 1938-02-22
Abstract: In the production of sizes, the reaction products obtained by the action of monohalogen fatty acids on alkali cellulose is treated with an aluminium compound, such as alum or aluminium acetate, and the precipitate formed is washed with water to free it from soluble salts and then treated with alkali.  The resulting product consists essentially of an alkali salt of a cellulose ether carboxylic acid, and can be diluted with water to give a size solution, or dried to give a size composition in powder form. The size solutions are suitable as adhesives, book-binding sizes, finishing and dressing agents and colour binding agents.  In an example, unbleached cellulose is etherified with monochloracetic acid in the presence of alkali, and the product, after dilution with water, is precipitated by the addition of alum solution.  The precipitate is washed and then soda lye is added till the mixture is weakly alkaline.  On dilution with water, a viscous size solution is produced.